催化作用
膜
钴
氧化物
氧化还原
电子转移
化学工程
化学
降级(电信)
铜
传质
分解
无机化学
材料科学
光化学
有机化学
色谱法
计算机科学
工程类
电信
生物化学
作者
Chenchen Meng,Zheng Wang,Wei Zhang,Lele Cui,Bo Yang,Haijiao Xie,Zhenghua Zhang
标识
DOI:10.1016/j.cej.2022.137811
摘要
Practical applications for the degradation of organic contaminants by conventional batch-mode heterogeneous advanced oxidation processes remain elusive due to mass-transfer limitations of short-lived reactive oxygen species (ROS). Nanoconfinement catalysis has received increasing attention because of enhanced reaction efficiency and mass and electron transfer. Here, we implemented the concept of nanoconfinement catalysis using a two-dimensional membrane. Ultrathin cobalt-copper oxide nanosheets (Co-Cu ONS) rich in active sites and oxygen vacancies were prepared through a facile solution reduction method. The assembled Co-Cu ONS membrane with active sites confined within membrane nanochannels spontaneously activates peroxymonosulfate and facilitates the generation of ROS and the redox cycles of metal cations. Therefore, an ultimate degradation efficiency (∼100%), ultrafast (∼86 ms) decomposition of organic pollutants, and excellent catalytic stability (greater than120 h) were achieved. The degradation rate is 103−5 times faster than the best state-of-the-art. This approach offers an attractive alternative for water purification with membrane-based nanoconfinement catalysts.
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